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June 11, 2018 C-1981-025/North Thompson Creek Mine JHB <br /> <br /> <br />Number of Partial Inspection this Fiscal Year: 0 <br />Number of Complete Inspections this Fiscal Year: 4 <br /> <br /> Page 2 of 6 <br /> <br /> <br />Inspection Topic Summary <br />NOTE: Y=Inspected N=Not Inspected R=Comments Noted V=Violation Issued NA=Not Applicable <br />Y - Air Resource Protection <br />R - Availability of Records <br />Y - Backfill & Grading <br />NA - Excess Spoil and Dev. Waste <br />NA - Explosives <br />Y - Fish & Wildlife <br />R - Hydrologic Balance <br />Y - Gen. Compliance With Mine Plan <br />NA - Other <br />NA - Processing Waste <br /> <br />NA - Roads <br />Y - Reclamation Success <br />R - Revegetation <br />NA - Subsidence <br />Y - Slides and Other Damage <br />Y - Support Facilities On-site <br />Y - Signs and Markers <br />NA - Support Facilities Not On-site <br />NA - Special Categories Of Mining <br />NA - Topsoil <br /> <br /> <br />COMMENTS <br /> <br />This was a complete inspection conducted by Janet Binns of CDRMS. The site is a reclaimed underground mine <br />with a permanent water treatment series of pond remaining to treat mine water discharge. Mine records are kept in <br />the Clerk and Recorders office at the Garfield County Courthouse in Glenwood Springs. The weather was hot, <br />dry and clear during the inspection. No mine personel accompanied the inspection nor are there any persennel on <br />site. <br /> <br />AVAILABILITY OF RECORDS – Rule 5.02.4(1): <br /> Mine records were verified at the Garfield County Clerk and Recorders Office. The Availability of <br />Records form is attached to this report. All records were up to date and filed appropriately. <br /> <br />HYDROLOGIC BALANCE - Rule 4.05 <br />Drainage Control 4.05.1, 4.05.2, 4.05.3; Discharge Structures 4.05.7, 4.05.10; Diversions 4.05.4; Effluent Limits <br />4.05.2; Drainage – Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: <br /> The inspector drove to the Mine 3 area to assure that any discharges are being routed to the treatment <br />system through the piping system and no surface expression of the drainage was visible. The slope was dry, and <br />no damp or seeping areas were observed. The passive treatment area area installed by Inactive Mine Program, <br />appeared in good repair, and had good vegetative cover in the sump. Iron stained discharge was observed in the <br />ditch below the passive treatment area. The discharge in the ditch is then directed to the west end of the long pond. <br /> <br />Two pipes discharge water into the long pond. The larger pipe directs water from Mine 1 (portal across the river) <br />to the long pond, and the smaller pipe routes water from mine 3 to the long pond. The water from Mine 1 pipe <br />was clear, while the water from Mine 3 was very red and iron laden entering the Long pond. Iron staining did not <br />continue very far in the Long Pond. Most of the discoloration had dropped out within roughly 30 feet from the <br />inflow. Cattails and other hydrophilic vegetation was growing in the long pond and performing as a filter. By the <br />time the water reached to east end of the long pond, the water was clear prior to discharging via pipe to treatment <br />pond 1, T-1.